Bob Moon: When the daily deal site Groupon goes public soon, its founders are likely to become billionaires. And here's why that's causing excitement in Chicago: Local startups are hoping some of that money will trickle back down to them.

In this building, Watermelon Express is like a tiny barnacle stuck to the side of the Groupon battleship. It's an example of how Groupon is trying to help small companies like this one get their legs.

Rangnekar: I would not want to be in any other city but Chicago right now.

Last year, Rangnekar met Groupon's founders Eric Lefkofsky and Brad Keywell. They liked his idea so much, they decided to invest in it and give him office space. Rangnekar was one of 10 local entrepreneurs the Groupon founders backed with their $100 million venture capital fund Lightbank. Groupon's IPO will almost certainly turn Lefkofsky, Keywell and other Groupon executives into billionaires.

And people in Chicago hope they'll plow even more money into local start-ups. That could help Chicago become less of a flyover city when it comes to tech. The Midwest has long trailed Silicon Valley, New York and New England in venture capital deals. Steve Kaplan teaches entrepreneurship at the University of Chicago Booth School of Business.

Steve Kaplan: We really haven't had a big winner where the winner has had people who are technology savvy, who want to put money back in. So it's a big deal.

But despite all the excitement, few people expect Chicago to edge out Silicon Valley anytime soon. Bump Technologies makes apps for smartphones and got its start in Chicago. But chief executive David Lieb says the company concluded there weren't enough engineers and software developers here. So they set up headquarters in Mountain View, Calif.

David Lieb: For us, you know, we knew we had to hire a bunch of people and being here in the Valley is really where all that technical talent is.

But Chicagoans are hoping Groupon's success will change that and seed the growth of what some here are calling Silicon Prairie.